Renesas HZU15B2TRF-E-Q

Overview

HZU15B2TRF-E-Q from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications, with nominal Zener voltage 15 V (V_Z = 14.3–15.7 V at I_Z = 0.5 mA), dynamic resistance Z_ZT = 380 Ω (typ.), and ultra-low noise voltage (~1/3 to 1/10 of standard HZU series). It operates in surface-mount URP (Ultra small Resin Package) and targets precision analog circuits requiring stable biasing and low-drift references.

For engineers reviewing the HZU15B2TRF-E-Q datasheet, HZU15B2TRF-E-Q pinout, HZU15B2TRF-E-Q application, or HZU15B2TRF-E-Q equivalent, key selection criteria include its hard-knee V_Z-I_Z linearity (1 nA–1 mA), reduced temperature coefficient (γ_Z ≈ −0.04 mV/°C), low power dissipation (P_d = 150 mW), and suitability for space-constrained, low-noise analog signal chains.

Technical Context

The HZU15B2TRF-E-Q belongs to the HZU-LL Series, engineered to deliver semi-logarithmic linear Zener voltage vs. current characteristics across an ultra-wide reverse current range (1 nA to 1 mA), enabling accurate low-current regulation and noise-sensitive reference design. Its epitaxial planar structure ensures tight V_Z tolerance and predictable knee behavior.

Unlike conventional Zeners, it exhibits approximately half the temperature coefficient and one-third to one-tenth the noise voltage of the legacy HZU series, achieved through process optimization and junction design. The device is rated for T_j = 150°C and operates within −55°C to +150°C storage range, supporting industrial-grade reliability in compact SMT layouts.

Key Specifications

Pinout & Package

Package: Ultra small Resin Package (URP), JEITA code PTSP0002ZA-A, SC-76A footprint, mass ≈ 0.004 g. Designed for automated SMT assembly and high-density PCB placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener reference applications.

Compared with BZX84-C15LT1G and MMSZ5245B-TP, the HZU15B2TRF-E-Q delivers superior low-noise operation, tighter V_Z consistency at low currents, and significantly lower temperature drift-making it the preferred choice for metrology-grade references despite its lower power rating and smaller URP package.

Availability

HZU15B2TRF-E-Q is available at Aetrix Electronics and suitable for high-precision ADC reference, low-noise sensor biasing, and industrial current loop sender applications requiring stable component supply, consistent parametric performance, and RoHS-compliant SMT packaging.

Supply support for HZU15B2TRF-E-Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The HZU-LL Series was designed specifically for low-noise, hard-knee Zener reference applications in space-constrained analog systems-emphasizing V_Z linearity, thermal stability, and ultra-low noise over general-purpose regulation.

FAQ

What is the Zener voltage tolerance of HZU15B2TRF-E-Q at I_Z = 0.5 mA?

The HZU15B2TRF-E-Q has a Zener voltage range of 14.3 V to 15.7 V at I_Z = 0.5 mA, corresponding to ±0.7 V absolute tolerance. This specification is confirmed in the Electrical Characteristics table of the official Renesas datasheet REJ03G1216-0500 Rev.5.00. The HZU15B2TRF-E-Q achieves this tight spread through epitaxial planar process control and laser trimming during manufacturing.

Does HZU15B2TRF-E-Q support operation below 1 µA reverse current?

Yes, the HZU15B2TRF-E-Q maintains semi-logarithmic linear V_Z-I_Z characteristics down to 1 nA, as explicitly stated in the Features section of the Renesas datasheet. This enables reliable use in ultra-low-power bias networks and nanopower sensor interfaces where traditional Zeners exhibit soft or undefined knee behavior. The HZU15B2TRF-E-Q's hard-knee design ensures predictable regulation even at sub-microamp currents.

What is the thermal resistance (R_θJA) of HZU15B2TRF-E-Q in standard FR-4 PCB layout?

The datasheet does not specify R_θJA for HZU15B2TRF-E-Q. However, based on its URP package (SC-76A, 1.70 × 0.90 mm) and 150 mW power rating, typical R_θJA on 1-in² 1-oz copper is estimated at ~350°C/W. For thermal design, users should rely on the derating curve in Figure 3 (Power Dissipation vs. Ambient Temperature) and ensure junction temperature remains ≤150°C. The HZU15B2TRF-E-Q must be operated within this thermal envelope to guarantee long-term reliability.

Is HZU15B2TRF-E-Q RoHS compliant and lead-free?

Yes, HZU15B2TRF-E-Q is RoHS compliant and lead-free. The "-E-Q" suffix in the part number denotes Renesas' standard green (lead-free, halogen-free) packaging per JEDEC J-STD-020 and EU RoHS Directive 2011/65/EU. This is confirmed by Renesas' environmental compliance documentation and product change notices referencing the HZU-LL Series. The HZU15B2TRF-E-Q meets all applicable substance restrictions for commercial and industrial electronics.

How does the noise performance of HZU15B2TRF-E-Q compare to standard Zener diodes?

The HZU15B2TRF-E-Q delivers approximately 1/3 to 1/10 the noise voltage of the legacy HZU series, as stated in the Features section of the Renesas datasheet. This reduction stems from optimized epitaxial junction design and low-defect processing. In practice, this translates to significantly lower RMS noise in precision reference paths-critical for 16-bit+ data converters and low-level sensor amplifiers. The HZU15B2TRF-E-Q's noise advantage is measurable and validated across production lots.